title: Phase diagram and piezoelectric response of (Ba₁-xCax)(Zr₀.₁Ti₀.₉)O₃ solid solution.
abstract: We report the phase diagram of (Ba1-xCax)(Zr0.1Ti0.9)O3 solid solution. It is found that substitution of smaller Ca ions for Ba ions can slightly increase the cubic-tetragonal (T) para-ferroelectric phase transition temperature and strongly decrease the T-orthorhombic (O) and O-rhombohedral (R) transition. This unique ferroelectric phase evolution is attributed to Ca off-centering effects. More importantly, lowering of the T-O or O-R phase transitions allows us to prepare the piezoelectric ceramics with a strain response as high as S/E ≈ 800 pm V(-1) (E = 10 kV cm(-1)) over a wide range of compositions with x ≈ 0.1-0.18 at room temperature, which may be interesting for piezoelectric applications.
authors.affiliation: Department of Electronics and Materials Science, Graduate School of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561, Japan.
authors.forename: Desheng
authors.initials: D
authors.lastname: Fu
authors.forename: Yuto
authors.initials: Y
authors.lastname: Kamai
authors.forename: Naonori
authors.initials: N
authors.lastname: Sakamoto
authors.forename: Naoki
authors.initials: N
authors.lastname: Wakiya
authors.forename: Hisao
authors.initials: H
authors.lastname: Suzuki
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Itoh